AAA Grade Natural Diamond Surface Set Multi-Step Core Drill Bits for Unconsolidated Formations

Surface-Set Diamond Bits are set with a singular layer of natural or synthetic diamond utilizing a hard matrix compound on the face of the bit. The diamond set design ensures sufficient overlap to prevent premature wear of the matrix.

Surface-Set diamond bits are primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bits. They are also recommended for use in drilling harder formations where the available rotational speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.

This type of bit is primarily recommended for use in drilling relatively soft, abrasive, unconsolidated formations that are not effectively drilled by impregnated diamond bit. It is also recommended for use in drilling harder formations where the available rotary speeds and bit loads are insufficient to use impregnated diamond bits due to drilling equipment limitations.

In most cases, surface set diamond bits will provide higher rates of penetration than in softer formations due largely to the greater degree of exposure of the individual diamond crystals.

To choose a right surface set for the formations drilled, we need at least consider the following aspects: diamond size, diamond grade, profile design.

The surface set diamond bit is produced from a single layer of natural diamond setting on the surface of bit crown with hard matrix.
Surface set diamond bit is mainly recommended for drilling soft to hard formations. Generally speaking, surface set diamond bit can provide satisfying penetration rate.

In order to confirm the surface-set bit quality, we have to confirm the following information:

Diamond sizes (spc – stones per carat)

As a general rule; the softer formation, the larger the diamonds used i.e. 20 to 25 spc. In hard formation, smaller diamonds 30 to 50 spc are typical.

*SPC is short for Stone per Carat

**40/60 is Forsun standard diamond size for natural diamond core bit

***Other sizes are available as per request

Diamond quality

The standard range of natural diamonds for surface set bits is chosen in a special allround grade with special quality. The quality includes selected and processed diamonds with a highly polished surface. These stones have a high impact resistance and may be considered as an universal type. Recommended for soft to medium hard formations.

Standard Profiles for Surface Set Core bits:

●Multi-steps

●Semi-round

●Face discharge (FD)

●Non-coring bits with concave profile

Delivery

Warranty and Service

We always concerned about our clients and provides them with warranty and service support.

The factory ensures equipment warranty for the major assemblies and units efficient for 12 months. The clients are supplied with all needed spare parts, tooling and auxiliary facilities.

The authorized dealers possess service centers to execute product warranty liabilities, after-sales service and equipment repair. The clients’ staff is also provided with theoretical and practical company instructions and consultations on all matters concerning execution of work and equipment operation.

Q: What's your delivery time?

A: Commonly need 7 working days to produce. Within 3 days if in stock.

Q: What methods of payment are accepted?

A: We agree T/T, L/C, West Union.

A: Based on order quantity. We can send it to you by Express, by Air, by Sea, and by Train. Or send the goods to your Chinese agent.

Q: How to control the quality?

A: We check & test every core drill bit before shipment.

Q: Do you agree samle order?

A: Yes, we welcome your sample order for testing our quality.

Q: Can we select the color of the drill bit?

A: Yes, we have standard rock hardness select index to choose core drill bit matrix hardness. If you need, we can make the core drill bit color based on your requirement.

Q: Do you have after-sale service and warranty service?

A: Any quality or quantity problem once confirmed, we will compensate you during our warranty period. Any question or problem we will reply you within 24 hours.

Q: Can I trust your company?

A: Our company has been certified by Chinese government, and verified by ISO-9001, just order from us!

Thank you for your support and we look forward to your inquiry!